Matter PreTest- Ogden

Front

What is a physical change of matter?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include cutting paper and freezing water.

Front

What is a chemical change of matter?

Back

A chemical change occurs when a substance transforms into a different substance with different properties. An example is the unexpected color change when iron rusts.

Front

What does the atomic number represent?

Back

The atomic number represents the number of protons in the nucleus of an atom.

Front

What is density?

Back

Density is a measure of how compact the atoms in a substance are, calculated as mass per unit volume.

Front

What is weight?

Back

Weight is the downward force caused by gravity acting on an object's mass.

Front

What is mass?

Back

Mass is a measure of the amount of matter in an object, typically measured in grams or kilograms.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What indicates a physical change has occurred?

Back

Examples of physical changes include changes in size, shape, or state of matter, such as melting or freezing.

Front

What indicates a chemical change has occurred?

Back

Indicators of a chemical change include unexpected color changes, gas production, or the formation of a precipitate.

Front

What is an example of a physical change?

Back

Cutting paper is an example of a physical change.